An insert for the attachment of objects to composite or plastic panels consists of two parts, a retainer and an insert. The retainer has a through-hole and knurls on its perimeter for gripping the walls of a receiving hole in the composite or plastic panel. The insert has multiple self-clinching features at increasing diameters which when inserted into the retainer rigidly attach it to the retainer. The panel is rigidly clamped between opposite sides of the panel by an enlarged head of the retainer and an opposing flange on the insert. The self-clinching features of different diameter permit the device to be used with panels of different thickness and allow a large tolerance range. A plain or threaded stud can be substituted for the threaded hole of the insert. Both the retainer and the insert can be metallic.

An upholstered component, such as panels, assembled onto a furniture frame or a chair mechanism by way of a connection system provides a robust connection and economical manufacturing process. The connection includes a T-nut and a spacer attached on opposite sides of a wood form to be upholstered. The threaded barrel of the T-nut inserted in a hole through the wood form and with T-nut prongs embedding into a surface of the side of the wood form that will be facing outwardly on the furniture. The spacer is inserted into the hole at the opposite side of the wood form and is retained therein by an interference fit. The wood form is upholstered and is then attached to the furniture frame or mechanism with a bolt connecting to the furniture frame or mechanism and then extending through the spacer, into the hole and into the threaded barrel of the T-nut.

A coupling system for coupling a curved object to a central shaft, the curved object includes an inner surface facing the central shaft and an outer surface. The system includes a coupling member for coupling the curved object to the central shaft; at least one pocket integrally formed on a curved surface of the curved object and defined as a depression with respect to at least one of the inner and outer surfaces. The pocket includes: a flat portion having an aperture for holding the coupling member; and a flange portion which merges continuously from the flat portion to the curved object and is shaped such that the flat portion is disposed perpendicularly to the coupling member; a fastening member for fastening the coupling member to the flat portion. The thickness of the flat portion and flange portion is the thickness of the curved object.

A fastening assembly suitable for being fastened to a substrate with a front face and a first hole. The fastening assembly includes a fastening plate with a second plate with front and rear faces and pierced with a second hole aligned with the first hole. The fastening plate front face is fastened to the substrate rear face. The assembly includes a nut holder with a third plate with front and rear faces and pierced with a third hole aligned with the second hole and a nut fastened to the third plate on the side of the rear face and coaxial with the third hole. The front face of the nut holder is fastened to the rear face of the fastening plate. The fastening plate includes a first fastener that engages with a second fastener of the nut holder to removably fasten the nut holder to the fastening plate.

A retaining device for attachment of objects to a wall surface includes a main body, a fastening arrangement, and a cover lockable to the main body that arches over the fastening arrangement. The main body has a bottom side, that faces the wall during mounting, and a top side, that faces away and includes a retaining ring. The fastening arrangement includes a fastener and a centering cap which fixes the fastener. The bottom side of the main body has a circular-ring-shaped surface, on inner and outer edges of which, in each case, one closed encircling web is provided which faces away from the bottom side. Two passage openings are provided in the circular-ring surface between the top and bottom sides. When attached, the main body is pressed onto the wall and an adhesive is injected through one of the passage openings until it emerges again at the other passage opening.

A rotation indication device for a rock bolt including a central rod with a threaded trailing portion. The rotation indication device includes a blind nut having a threaded central recess for engaging the threaded trailing portion and a visual indication means provided at a bottom portion of the central recess and configured such that upon movement of the threaded trailing portion of the central rod into the bottom portion of the central recess, the central rod forces at least a portion of the visual indication means to move through a passage in the blind nut between the bottom portion of the central recess and the outside of the blind nut.

Disclosed is a system for connecting two panels together. A recess is formed in the edge of one panel, and an insert is pressed into and held within the recess. The top of the insert includes holes for receiving epoxy, and epoxy conducting shafts and circuits formed on the outside of the insert assist in the encapsulation of the insert within the panel edge. The top of the insert includes an aperture formed such that a fastener can be received into a cavity formed in the recess and then driven to be secured into a fastener-receiving insert installed into the second panel.

The disclosure provides a pre-embedded anti-loosening nut embedded in a plastic component. The pre-embedded anti-loosening nut includes a main body portion and a plurality of radiating portions. The main body portion has a threaded hole. The radiating portions are disposed around a periphery of the main body portion. Each of the radiating portions has a first side and a second side connected with each other. The first side and the second side form a first included angle, and the second side is connected with the first side of another adjacent radiating portion to form a second included angle.

A vehicle drive train assembly includes a propeller shaft and a nut. The nut has a first part and a second part. The first part is movable with respect to the propeller between an uninstalled position and an installed position of the nut. The second part is stationary with respect to the propeller shaft in the uninstalled position and the installed position.

The invention relates to a functional, adhesive mounting apparatus set for the mounting of products used in different sectors such as land, air and sea vehicles, home office and similar space decorations and medical products.